/*
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 * and open the template in the editor.
 */

package homework.demo04;

/**
 *
 * @author Administrator
 */
public class CheckPhone {
    public static void main(String[] args) {
        String mobile="1373712929";
        boolean flag=true;
        if(mobile.length()!=11){
            flag=false;
        }
        if(!(mobile.startsWith("13")||mobile.startsWith("15")))
            flag=false;
       String numstr="0123456789";
       for(int i=0;i<mobile.length();i++){
           char c=mobile.charAt(i);
           int temp=numstr.indexOf(c);
           if(temp<0){
               flag=false;
               break;
           }
       }
       if(flag)
       {
           System.out.println("是合法的手机号码");
       }
       else{
           System.out.println("不是合法的手机号码");
       }
    }

}


